Yes it does, it can cost quite a bit, depending on what you want to copyright, if its music or something, then you can send it through recorded delivery back to your house, and it will get to you, but thats a cheap copyright
. It can cost loads for you to copyright something, and I wouldn't do it unless its completely necessary if I were you...
http://www.copyrightservice.co.uk/
thats how you would go about copyrighting something afaik...